Chrysler's legendary 426 Hemi race engine revolutionized American motorsports in the '60s, dominating both the NASCAR oval tracks and the quarter-mile drag strips of the NHRA and AHRA. Getting its name (and power!) from the hemispherical shape of its massive combustion chambers, the factory-stock Hemi was officially rated at 425 horsepower, but in reality it produced closer to 500hp...or more! The race-only version of the Hemi was introduced in 1964 (much to the chagrin of Ford and Chevy!), and the legendary Street Hemi was offered to the general public in 1966 (again, much to the chagrin of Ford and Chevy!). Chrysler continues to offer versions of the Hemi today, keeping the legend alive.